Ventilating-screen for windows



(No Model.)

B. W; PHILBROOK.

VENTILATING SCREEN FOR WINDOWS. No. 286,555. 5 Patented Oct. 9, 1883.

PATENT FFICE.

EB'IMELINE V. PHILBR-OOK, OF BOSTON, MASSACHUSETTS.

VENTlLATlNG-SCREEN- FOR WINDOWS.

SPECIFICATION" forming part of Letters Patent No. 286,55Q, dated October9, 188?.

-Application filed March 26,1853. (No model.)

To all whom it mayconcern:

Be it known that I, 'EMMELINE XV. PHIL- BnooK, of Boston, in the countyof Suffolk and sufficient distance to admit it, and he] d in place byclosing the sash against it.

Window l ventilators have commonly been made with a frame covered with anetting of wire or other material, and provided with acover or shieldhinged at the bottom and adapt ed to he opened a greater or lessdistance, according as more or less air is required. In the presentinvention a shield or cover hinged to the frame is also employed, and inconnection with it are provided devices which act automatically to holdthe shield or cover at any desired angle. These devices consist ofcurved arms provided with a series of notches or indentations, whichengage pins or projections on the ends of the shield. The arms arepressed against said pins with sufficient force to hold the shield inany position. in-which it may be placed. 011 the opposite side of theframe from the hinged cover or shield is an extension piece or slidemoving in grooves in the back of said frame. The object of this slide isto afford greater nicety of adjustment to the air-opening, and also toenable the ventilator to fit windows of different widths. Along thelower edge of the frame is placed a metal strip let into the wood, andwhichforms a ledge or trough for catching any particles of dust that maysift through the screen.

The invention consists in" the ventilator as a whole, in the several newimprovements herein described, and in the particular con structions,combinations, and arrangements of parts, as hereinafter more fully setforth.

In the accompanying drawings, Figure 1 is a perspective view of. awindow-ventilator constructed in accordance with the invention; Fig. 2,a vertical section of the same, partly in elevation; Fig. 3, a frontelevation of a portion of a screen, showing a two-part extension-piece;

Fig. 4, a rear elevation of the same, and Fig. 5 a detail view.

A is the frame, preferably of wood, inclosing a screen, a, of finewire-netting or other perforate medium, the frame being madesufiiciently strong to support the weightof the window-sash. I

To the bottom strip of the frame is hinged a shield or cover, B, whichmay be shut entirely to exclude all air or opened more or less to admita greater or less draft. This cover or shield may be made of variousmaterials. I prefer, for the sake of lightness and economy, to constructit of stiff paper or straw board, with the edges bound with metal, asshown.

At the ends of frame A are pivoted curved arms 0, having their inneredges provided with a series of notches or indentations thatengage pinsb, projecting from the ends of cover 13. By the tension of the smallsprings c, the notched arms are caused to bear upon the pins 1) withsufficient pressure to hold the cover or shield in whatever position itmay be placed. The sides of the notches in arm s'C are inclined, so thatthey are lifted up to allow the pins to pass whena moderate degree offorce is brought to bear on the cover through cords D E. At the lowerends of the arms C are projections c, which act as stops to limit themovement of the cover and prevent the pins 22 escaping from said arms.of which the cover may be opened or closed, are provided, one, D, forpulling down the shield or cover, attached near the upperedge thereof,the other, for pulling up or closing the cover, passing through the eyese c in the frame. XVhere the screen or ventilator is to be used underthe lower sash, these cords are not needed, and may be dispensed with.

At the back of frame A is an extension.- piece, F, also made of paper,pasteboard, straw-board, or similar material. This piece has attached toits face parallel strips f, of brass or other metal or material, whichwork in grooves or slits in the frame and permit the piece F to slideeasily thereon. As the strips and their respective grooves are inclinedin opposite directions, they serve also to keep the piece F frombecoming detached. Spring friction devices f (see Fig. 4,) secured tothe back of the frame, act by their contact with Two sets of cords, bymeans the metal bands around the piece F to hold it from accidentalslipping when entirely closed, and to check its complete Withdrawal. To

- remove the slide it is only necessary to apply frame.

sufficient force to cause the edge of the piece to depress the frictiondevices and ride over them.

In order to reduce the size of the device to the smallest compass, whichfor some purposes as, for instance, to carry it about the person for usein traveling in a railway-car-is desirable, the frame and screen aremade smaller than usual, and the extension-piece F made 'in' two partshinged together, as shown in Fig. 3. The part F can be folded back whendesired .to pack up the device for transportation, and

it is also provided with runners or strips f, which take into thegrooves in the back of the This construction both reduces the size ofthe device and furnishes additional means for'adjustment.

The shield or cover B not only regulates the supply of air, but alsoserves to deflect the same upward, preventing injurious draft; In thisit is aided by the side pieces, B, of cloth, the edges of, which arefastened to the frame and cover, respectively. Should any dust or otherfine particles of matter sift through the screen a, they would strikeagainst the shield B, and,

falling down between it and the frame, be caught by the ledge G, whichis or may be a stripofbrassor other metal let into the frame A;

In use the ventilator would be placed in the window-frame, between thesash, which would be partly opened for that purpose, and either theupper or lower sill of the window-frame, the sliding extension-piecewould be adjusted to uncover as much as deemed necessary of theperforate screen and to close up the space fsired angle, in whichposition it will be re that the frame'does not occupy, and the shield orcover set by means of the cords atthe detained by the notched arms, asexplained. Small points a in the frame penetrate slightly into thewood-work of the window and aid in holding the device securely in place.

The shield B and sliding piece F being made of very light material, andthe whole device being readily reducible to small compass and to shapeconvenient forhandling, the improved v ventilator may be easily carriedfrom place to place, as its use may be needed, or maybe carried inthepocket 'or satchel for use while traveling.

Having now fully described my said invention and the manner of carryingthe same into effect, what I claim is 1. In a window-ventilator, thecombination of the frame, the shield hinged thereto, the spring-armspivoted to said frame and pro vided with serrations or notches havinginclined sides, and the pins fixed in said shield and engaging saidspring-arms, substantially as described.

2. The combination of the frame inclosing a screen of wire or othermaterial, the hinged shield or cover, and the notched arms bearing withyielding pressure on pins projecting from said shield or cover,substantially as and for the purpose described.

3. The combination, with the screen and hinged shield or cover, of thenotched spring-' 6. The combination. with the screen, of a two-partsliding extension-piece, substantially as described.

7. The combination, with the frame and open-workscreen, of a slidingextension-piece provided with metal strips inclined in oppo sitedirections working in slits or grooves in said frame, substantially asdescribed.

In testimony whereof I have signed this specification in the. presenceof two subscrib ing witnesses.

EMMELIN E \V.

Witnesses:

WV. H. DAVIS, ANNIEG. FLAGG.

PHILBROOK.

